將數據從UITableViewCell cocoa touch類傳輸到UIViewController類

Question

好吧，所以我基本上試圖做的是將數據從UITableViewCell類傳遞到UIViewController類。下面是我的UITableViewCell：

class OrderCell: UITableViewCell { 

override func awakeFromNib() { 
    super.awakeFromNib() 

} 

var post: OrderModel! 
var link: Link! 

var addedList: [String:Float] = [:] 


@IBOutlet weak var dishName: UILabel! 
@IBOutlet weak var dishDescriptionAndPrice: UILabel! 
@IBOutlet weak var numberOfOrders: UILabel! 
@IBOutlet weak var addOrderBtn: UIButton! 
@IBOutlet weak var subtractOderBtn: UIButton! 

@IBAction func addButtonPressed(sender: AnyObject) { 
    if numberOfOrders.text == "9" { 
     numberOfOrders.text = "9" 
    } else { 
     numberOfOrders.text = String((Int(numberOfOrders.text!)! + 1)) 
    } 
    addedList.updateValue(post.dishPrice, forKey: post.dishName) 
    print(addedList) 
} 

@IBAction func subtractButtonPressed(sender: AnyObject) { 
    if numberOfOrders.text == "0" { 
     numberOfOrders.text = "0" 
    } else { 
     numberOfOrders.text = String((Int(numberOfOrders.text!)! - 1)) 
    } 
} 

func getOrders() -> Dictionary<String, Float> { 
    return addedList 
} 


func configureCell(post: OrderModel) { 
    self.post = post 
    self.dishName.text = post.dishName 
    self.dishDescriptionAndPrice.text = post.dishDescription 
    self.numberOfOrders.text = "0" 
} 

} 

我所要做的，就是有我的其他類（是的UIViewController），從上面的類檢索「addedList」。我顯然不能使用prepareForSegue，而且我也沒有找到一種方法來實現與這兩個類的兼容。我很樂於創建一個新班級作爲兩者之間的「橋樑」並傳輸數據，但我再次找不到辦法做到這一點。任何和所有的幫助非常感謝，提前謝謝。

爲了得到更具體的結果，UIViewController保存了我的tableview，而上面的類只是每個單獨單元的對象文件。我需要在調用addButtonPressed IBaction時傳輸數據。

Answer 1

你可以在你的類創建一個代表做到這一點。而在你的視圖控制器類，下在indexPath行單元格，添加：

cell.delegate = self 

和更新你的類是這樣的：

protocol ClassNameDelegate:class { 
     func addButtonAction(addedList:[String:Float]) 
    } 

     @IBOutlet weak var dishName: UILabel! 
     @IBOutlet weak var dishDescriptionAndPrice: UILabel! 
     @IBOutlet weak var numberOfOrders: UILabel! 
     @IBOutlet weak var addOrderBtn: UIButton! 
     @IBOutlet weak var subtractOderBtn: UIButton! 


     //Create a delegate 

     weak var delegate: ClassNameDelegate? 

     @IBAction func addButtonPressed(sender: AnyObject) { 
      if numberOfOrders.text == "9" { 
       numberOfOrders.text = "9" 
      } else { 
       numberOfOrders.text = String((Int(numberOfOrders.text!)! + 1)) 
      } 
      addedList.updateValue(post.dishPrice, forKey: post.dishName) 
      print(addedList) 

      // Call this when added list is done and get the call to your view controller. 

      if delegate != nil { 
       delegate?.addButtonAction(addedList: addedList) 
      } 
     } 

     @IBAction func subtractButtonPressed(sender: AnyObject) { 
      if numberOfOrders.text == "0" { 
       numberOfOrders.text = "0" 
      } else { 
       numberOfOrders.text = String((Int(numberOfOrders.text!)! - 1)) 
      } 
     } 

     func getOrders() -> Dictionary<String, Float> { 
      return addedList 
     } 


     func configureCell(post: OrderModel) { 
      self.post = post 
      self.dishName.text = post.dishName 
      self.dishDescriptionAndPrice.text = post.dishDescription 
      self.numberOfOrders.text = "0" 
     } 

     } 

最後，在您的視圖控制器類導入此委託方法，與導入tableView委託和數據源的方式相同。

Answer 2

單元格不是存儲這種信息的好地方。您應該將信息存儲在視圖控制器中。並且當你按下單元格按鈕時，由於單元格的索引路徑而檢索信息。

在你的細胞：

func configureCell(post: OrderModel, delegate:UIViewController) { 
    self.dishName.text = post.dishName 
    self.dishDescriptionAndPrice.text = post.dishDescription 
    self.numberOfOrders.text = "0" 
    self.addButton.addTarget(delegate, action: #selector(delegate.addButtonPressed(_:)), for: UIControlEvents.touchUpInside) 
} 

在您的視圖控制器：

//store your data in your view controller 
var data=[OrderModel]() 

func addButtonPressed(_ button:UIButton){ 
    let selectedCell=button.superview?.superview? as! OrderCell 
    let indexPath=tableView.indexPath(for: selectedCell) 
    let cellData=data[indexPath!.row] 

    if cellData.numberOfOrders==9{ 
     selectedCell.numberOfOrders.text="9" 
    }else{ 
     selectedCell.numberOfOrders.text=String(cellData.numberOfOrders+1) 
    } 
}